package com.changgou.goods.dao;
import com.changgou.goods.pojo.Brand;
import org.apache.ibatis.annotations.Select;
import tk.mybatis.mapper.common.Mapper;

import java.util.List;

/****
 * @Author:itheima
 * @Description:Brand的Dao
 *****/
public interface BrandMapper extends Mapper<Brand> {
    /**
     * 根据分类id查询品牌集合
     */
    @Select("SELECT * FROM tb_brand WHERE id IN (SELECT brand_id FROM tb_category_brand WHERE category_id = #{categoryId})")
    List<Brand> findByCategoryId(Integer categoryId);
}
